package com.java.it;

public abstract class AbstractLogger {
    public static int INFO=1;
    public static int DEBUG=2;
    public static int ERROR=3;

    protected  int level;
    //责任链中的下一个元素
    protected AbstractLogger nextLogger;

    public void setNextLogger(AbstractLogger nextLogger) {
        this.nextLogger = nextLogger;
    }
    public void logMessage(int level,String message){
        if (this.level<=level){
            write(message);
        }
        if (nextLogger!=null){
            nextLogger.logMessage(level,message);
        }
    }
    abstract protected void write(String message);
}
